Author: Huong Nguyen
MDL-80167 admin: Add environment check for Oracle database
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f0ae7c434347889bd0a867447647392f07e87165
http://github.com/moodle/moodle/commit/f0ae7c434347889bd0a867447647392f07e87165
+ 4.1 en [oracledatabaseinuse,core_admin]